<!--  -->
<template>
  <div class='login_container'>
      <!-- 登陆盒子 -->
      <div class="login_box">
          <!-- 头像 -->
          <div class="avatar_box">
              <img src="../assets/logo.png" alt="">
          </div>
          <!-- 登陆表单 model 数据绑定、rules 数据检验规则、 ref 获取实例对象-->
          <el-form label-width="0px" class="login_form" :model="loginForm" :rules="loginFormRules" ref="loginFormRef">
            <!-- 用户名 -->
            <el-form-item label="" prop="username">
                <el-input prefix-icon="el-icon-user" v-model="loginForm.username"></el-input>
            </el-form-item>
            <!-- 密码 -->
            <el-form-item label="" prop="password">
                <el-input prefix-icon="el-icon-lock" v-model="loginForm.password" type='password'></el-input>
            </el-form-item>
            <!-- 按钮 -->
            <el-form-item label="" class="btns">
                <el-button type="primary" round @click="login">登陆</el-button>
                <el-button type="info" round @click="resetLoginForm">重置</el-button>
            </el-form-item>
          </el-form>
      </div>
  </div>
</template>

<script>
export default {
  data () {
    return {
      // 表单数据绑定
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      // 表单的验证规则
      loginFormRules: {
        // 验证密码是否合法
        password: [
          { required: true, message: '请输入登陆密码', trigger: 'blur' },
          { min: 3, max: 15, message: '长度在 3 到 15 个字符', trigger: 'blur' }
        ],
        // 验证用户名是否合法
        username: [
          { required: true, message: '请输入登陆名称', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    // 点击重置表单
    resetLoginForm () {
      // this 是 login.vue 的实例
      console.log(this)
      this.$refs.loginFormRef.resetFields()
    },
    login () {
      this.$refs.loginFormRef.validate(async valid => {
        // console.log(valid)
        // eslint-disable-next-line no-useless-return
        if (!valid) return
        const { data: res } = await this.$http.post('login', this.loginForm)
        console.log(res)
        if (res.meta.status !== 200) return this.$message.error('错了哦，这是一条登陆失败消息')
        this.$message('这是一条登陆成功消息提示')
        // 保存登陆成功的 token、 保存到sessionStorage
        // console.log(res)
        window.sessionStorage.setItem('token', res.data.token)
        // 导航跳到hone
        this.$router.push('/home')
      })
    }
  }
}
</script>

<style lang="less" scoped>
.login_container{
    background-color: #2b4b6b;
    height: 100%;

    .login_box {
        width: 450px;
        height: 300px;
        background-color: #fff;
        border-radius: 3px;
        position: absolute;
        left: 50%;
        top: 50%;
        transform: translate(-50%,-50%);//自身偏移

        .avatar_box {
            height: 130px;
            width: 130px;
            border: 1px solid #eee;
            border-radius: 50%;
            padding: 10px;
            box-shadow: 0 0 10px #ddd;
            position: absolute;
            left: 50%;
            transform: translate(-50%,-30%);
            background-color: #fff;
            img {
                height: 100%;
                width: 100%;
                border-radius: 50%;
                background-color: #eee;
            }
        }
    }
}
.login_form {
    position: absolute;
    bottom: 0;//底部对齐
    width: 100%;
    padding: 0 20px;//上下0 、左右20
    box-sizing: border-box;
}

.btns {
    display: flex;//居右对齐
    justify-content: flex-end;
}
</style>
